Valve

ABSTRACT

A corrosion resistant valve of the stopcock type is provided, the valve body and valve plug preferably being of Teflon, the plug being tapered with an integral resilient cup or flange at the lower end engaging an inner face in the valve body, a clamping plate urging the valve plug downwardly against the resilient action of the lower end flange by engagement with an upper shouldered flange which is seated in a bore in the body.

United States Patent 1 [111 3,790,132

Schmitt 1 1 Feb. 5, 1974 [54] VALVE 3,228,654 1/1966 011m, Jr. 251/309 [76] Inventor: s. Schmi, BOX 493, 400 3,434,691 3/1969 Hamilton 251/309 X Old Penllyn Pk., Penllyn, Pa. 19422 Primary Examiner-Samue1 Scott Attorney, Agent, or Firm-Zachary T. Wobensmith, 2nd

[5 7 ABSTRACT A corrosion resistant valve of the stopcock type is pro-- 7 Claims, 4 Drawing Figures VALVE BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to valves and more particularly to a corrosion resistant valve of the stopcock type.

2. DESCRIPTION OF TI-IEPRIOR ART Various valves of the stopcock type have heretofore been proposed including those made partially or wholly of synthetic plastic material.

In valves of the stopcock type employing a valve plug of synthetic plastic material, illustrative constructions being shown in US. Pat. Nos. 3,038,694 to Dunbeck et al., and 3,142,474 to Nelson, external springs were employed at the smaller end of the plug to aid in seating the plug in the body for sealing. The Nelson patent shows annular sealing strip and annular bearing strips on the exterior of the valve plug in engagement in the valve body. Roberts, US. Pat. No. 2,018,034 shows a draw down spring for a metallic valve plug.

It has also been proposed, as shown in Schenck, US. Pat. No. 2,539,106 to insert a resilient pador cushion between the lower end of the plug and the bottom inner surface of the valve body to provide resilience and take up any axial shock on the stem. Clade, in US. Pat. No. 2,718,665 shows a spring to urge the valve plug upwardly.

The use of synthetic plastic materials such as Teflon for valve plugs is shown by Dunbeck, US. Pat. No. 3,038,694, Nelson, U.S. Pat. No. 3,142,474, and others.

None of these shows a valve body and valve plug of Teflon in which the valve plug has an integral resilient downwardly and outwardly extending cap or flange which is held in compression by a clamping plate on the body at the opposite end of the valve plug.

SUMMARY OF THE INVENTION In accordance with the invention, a corrosion resistant valve plug and valve body of synthetic plastic material preferably Teflon, are provided in which the lower end of the valve plug has a downwardly and outwardly extending cup or flange engaging an interior surface in the valve body and against which it is urged by a holding plate at the opposite end of the valve plug, the body having flanged-connections for bolting into a fluid line.

It is the principal object of the present invention to provide a corrosion resistant valve having a rotatable valve plug carried in a valve body which is simple in construction yet sturdy and reliable in operation.

It is a further object of the invention to provide a corrosion resistant valve which has a minimum number of parts and in which the valve plug has an integral resilient portion to aid in sealing.

Other objects and advantageous features of the in vention will be apparent from the description and claims.

BRIEF DESCRIPTION OF THE DRAWINGS The nature and characteristic features of the invention will be more readily understood from the following description taken in connection with the accompanying drawings forming part hereof, in which:

FIG. 1 is'a top plan view of a valve in accordance with the invention FIG. 2 is a longitudinal vertical sectional view taken approximately on the line 2-2 of FIG. 1;

FIG. 3 is an end elevational view parts being broken away to show the details of construction; and

FIG. 4 is an enlarged fragmentary sectional view at the. lower end of the valve plug.

It should, of course, be understood that the description and drawings herein are illustrative merely and that various modifications and changes can be made in the structure disclosed without departing from the spirit of the invention.

Like numerals refer to like parts throughout the several views.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now more particularly to the drawings, a unitary valve body 10 is provided preferably of the tough wear resistant synthetic tetrafluoroethylene resin known as Teflon.

The valve body 10 is preferably substantially cylindrical on the exterior with parallel end faces 11 and 12 and with cut-outs 13 for termination of bolt holes 14,

extending to the end faces 11 and 12 for clamping the body 10 in a fluid line for use, by bolts (not shown).

A longitudinal 'fluid passageway 15 connects the end faces 11 and 12.

Extending downwardly a short distance from the top of the body 110 a cylindrical bore 117, is provided with its axis intersecting the axis of the passageway 15, the bore 17 terminating at a flat face 13.

A cylindrical bore 21), concentric with the bore 17 extends downwardly therefrom to a flat lower end face 21 anda tapered bore 22 extends downwardly from the bores 17 and 20, in intersecting relation to the passageway 15, to an interior flat face 23.

A valve plug 25 is provided, preferably of the same material as the valve body 10, having a valve stem 26 with which an operating handle 27 is in engagement.

The valve plug 25, below the valve stem 26 has a shouldered flange 28for engagement with the flat face 21 and has a tapered plug portion. 30 complemental to the bore. 22.

The tapered plug portion has a central opening 311for establishing and shutting off communication with the passageway 15.

The valve plug 25 at its lower end, has a cup shaped or flaring flange portion 33 with a lower margin 34,

which is rounded in transverse cross section engaging the end face 23. The shape of the flange portion 33 is such as to provide resilience in the flange portion 33 when pressure is applied thereon from above.

The valve plug 25 is held in place, with the flange, portion 33 resiliently engaged with the end face 23 by a holding or clamping plate 35 which engages the face 18 and whichh has a central aperture 36 through which the valve stem 26 extends. The holding plate 35 engages the shouldered flange 28 and urges it into engagement with the face 211 which serves as a shoulder Bolts 38 hold the clamping plate 35 in place. The mode of use will be apparent from the foregoing.

The valve plug 25 is shown in open position with the central opening 31 of the tapered plug portion 30 aligned with the longitudinal passageway in the valve body 10.

When desired the valve plug 25 can be rotated by manipulation of the operating handle 27 to reduce or shut off flow.

The resilence of the flaring flange 33 cooperates with the clamping plate 35 to permit turning of the tapered plug portion 30 in its bore 22 while avoiding leakage and the valve plug portion 30 is held in the bore 22 by the engagement of the clamping plate 35 and the engagement of the shouldered flange 28 with the face 21.

The synthetic plastic employed is inert and resistant to corrosion.

I claim:

1. A valve comprising a valve body of corrosion resistant synthetic plastic material with a fluid passageway between its ends and a valve plug receiving bore in intersecting relation to said passageway with a flat interior terminal face offset from said passageway,

a valve plug having a valve plug portion in said valve plug receiving bore,

said plug portion having in intersecting relation thereto a fluid passageway for alignment with the fluid passageway in said body,

said plug portion at one end having an end face with an integral resilient flaring flanged portion for engagement with said terminal face, and

a clamping plate engaged with said valve body and said valve plug and urging said flanged portion into engagement with said terminal face.

2. A valve as defined in claim 1 in which said valve plug has a stem extending through said clamping plate, and

said valve plug has a flange with which said clamping plate is in engagement.

3. A valve as defined in claim 1 in which said flanged portion has a margin engaging said terminal face which is curved in cross section.

4. A valve as defined in claim lin which said bore in said body is tapered and of decreasing diameter toward said terminal face, and

said plug portion is tapered complemental to said bore.-

5. A valve as defined in claim 4 in which said valve plug has a stem extending through said clamping plate,

said valve plug has a flange extending outwardly from said stem with which said clamping plate is in engagment, and

said body has a shoulder with which said flange is held in engagement by said clamping plate.

6. A valve as defined in claim 1 in which said body has a bore for the reception of said clamping plate,

said body has said valve plug receiving bore concentric with and below said bore for the reception of said clamping plate.

7. A valve as defined in claim 6 in which said valve plug has an operating stem, and

a flange extending outwardly from said stem, and

said body has a bore between said bore for said clamping plate and said valve plug receiving bore 

1. A valve comprising a valve body of corrosion resistant synthetic plastic material with a fluid passageway between its ends and a valve plug receiving bore in intersecting relation to said passageway with a flat interior terminal fAce offset from said passageway, a valve plug having a valve plug portion in said valve plug receiving bore, said plug portion having in intersecting relation thereto a fluid passageway for alignment with the fluid passageway in said body, said plug portion at one end having an end face with an integral resilient flaring flanged portion for engagement with said terminal face, and a clamping plate engaged with said valve body and said valve plug and urging said flanged portion into engagement with said terminal face.
 2. A valve as defined in claim 1 in which said valve plug has a stem extending through said clamping plate, and said valve plug has a flange with which said clamping plate is in engagement.
 3. A valve as defined in claim 1 in which said flanged portion has a margin engaging said terminal face which is curved in cross section.
 4. A valve as defined in claim 1 in which said bore in said body is tapered and of decreasing diameter toward said terminal face, and said plug portion is tapered complemental to said bore.
 5. A valve as defined in claim 4 in which said valve plug has a stem extending through said clamping plate, said valve plug has a flange extending outwardly from said stem with which said clamping plate is in engagment, and said body has a shoulder with which said flange is held in engagement by said clamping plate.
 6. A valve as defined in claim 1 in which said body has a bore for the reception of said clamping plate, said body has said valve plug receiving bore concentric with and below said bore for the reception of said clamping plate.
 7. A valve as defined in claim 6 in which said valve plug has an operating stem, and a flange extending outwardly from said stem, and said body has a bore between said bore for said clamping plate and said valve plug receiving bore for said flange. 